The invention relates to a smashing, screening and circulating
coal feeding
system which comprises a mixed
coal bunker, a
coal feeding material
nozzle, an iron separator, a smasher and a number one coal feeding
belt conveyor. The lower portion of the number one coal feeding
belt conveyor is connected with the mixed coal
bunker, the coal feeding material
nozzle is positioned at the bottom of the mixed coal
bunker, the lower portion of the coal feeding material
nozzle is connected with the smasher, and materials after being processed are conveyed to a boiler by the
belt conveyor. The smashing, screening and circulating coal feeding
system is characterized in that a vibratory screening
machine is additionally arranged at an outlet of the smasher, a material separating nozzle is arranged on the lower portion of the vibratory screening
machine and connected with a number two below-screen belt conveyor,
coal briquette with qualified
granularity is conveyed to the boiler by the number two below-screen belt conveyor, materials on a screen of the vibratory screening
machine are conveyed to a number three above-screen belt conveyor, and a hanging rack is arranged on the end portion of the number three above-screen belt conveyor. By the smashing, screening and circulating coal feeding
system, resource waste caused by incomplete burning of large-sized coal is effectively reduced, burning efficiency of the
coal briquette is improved, production cost of the boiler is reduced, and the problems of difficulty in raw coal separating and
high load of the coal smasher are solved. The smashing, screening and circulating coal feeding system is suitable for closed cycle processes like smashing, screening, separating and the like of bulky materials.